package net.minecraft.client.renderer.entity;

import net.minecraft.block.state.IBlockState;
import net.minecraft.client.Minecraft;
import net.minecraft.client.model.ModelBase;
import net.minecraft.client.model.ModelMinecart;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.entity.item.EntityMinecart;
import net.minecraft.util.MathHelper;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.Vec3;

public class RenderMinecart<T extends EntityMinecart> extends Render<T> {
	private static final ResourceLocation minecartTextures = new ResourceLocation("textures/entity/minecart.png");

	/** instance of ModelMinecart for rendering */
	protected ModelBase modelMinecart = new ModelMinecart();

	public RenderMinecart(RenderManager renderManagerIn) {
		super(renderManagerIn);
		this.shadowSize = 0.5F;
	}

	/**
	 * Actually renders the given argument. This is a synthetic bridge method,
	 * always casting down its argument and then handing it off to a worker function
	 * which does the actual work. In all probabilty, the class Render is generic
	 * (Render<T extends Entity>) and this method has signature public void
	 * doRender(T entity, double d, double d1, double d2, float f, float f1). But
	 * JAD is pre 1.5 so doe
	 */
	public void doRender(T entity, double x, double y, double z, float entityYaw, float partialTicks) {
		GlStateManager.pushMatrix();
		this.bindEntityTexture(entity);
		long i = (long) entity.getEntityId() * 493286711L;
		i = i * i * 4392167121L + i * 98761L;
		float f = (((float) (i >> 16 & 7L) + 0.5F) / 8.0F - 0.5F) * 0.004F;
		float f1 = (((float) (i >> 20 & 7L) + 0.5F) / 8.0F - 0.5F) * 0.004F;
		float f2 = (((float) (i >> 24 & 7L) + 0.5F) / 8.0F - 0.5F) * 0.004F;
		GlStateManager.translate(f, f1, f2);
		double d0 = entity.lastTickPosX + (entity.posX - entity.lastTickPosX) * (double) partialTicks;
		double d1 = entity.lastTickPosY + (entity.posY - entity.lastTickPosY) * (double) partialTicks;
		double d2 = entity.lastTickPosZ + (entity.posZ - entity.lastTickPosZ) * (double) partialTicks;
		double d3 = 0.30000001192092896D;
		Vec3 vec3 = entity.func_70489_a(d0, d1, d2);
		float f3 = entity.prevRotationPitch + (entity.rotationPitch - entity.prevRotationPitch) * partialTicks;

		if (vec3 != null) {
			Vec3 vec31 = entity.func_70495_a(d0, d1, d2, d3);
			Vec3 vec32 = entity.func_70495_a(d0, d1, d2, -d3);

			if (vec31 == null) {
				vec31 = vec3;
			}

			if (vec32 == null) {
				vec32 = vec3;
			}

			x += vec3.xCoord - d0;
			y += (vec31.yCoord + vec32.yCoord) / 2.0D - d1;
			z += vec3.zCoord - d2;
			Vec3 vec33 = vec32.addVector(-vec31.xCoord, -vec31.yCoord, -vec31.zCoord);

			if (vec33.lengthVector() != 0.0D) {
				vec33 = vec33.normalize();
				entityYaw = (float) (Math.atan2(vec33.zCoord, vec33.xCoord) * 180.0D / Math.PI);
				f3 = (float) (Math.atan(vec33.yCoord) * 73.0D);
			}
		}

		GlStateManager.translate((float) x, (float) y + 0.375F, (float) z);
		GlStateManager.rotate(180.0F - entityYaw, 0.0F, 1.0F, 0.0F);
		GlStateManager.rotate(-f3, 0.0F, 0.0F, 1.0F);
		float f5 = (float) entity.getRollingAmplitude() - partialTicks;
		float f6 = entity.getDamage() - partialTicks;

		if (f6 < 0.0F) {
			f6 = 0.0F;
		}

		if (f5 > 0.0F) {
			GlStateManager.rotate(MathHelper.sin(f5) * f5 * f6 / 10.0F * (float) entity.getRollingDirection(), 1.0F,
					0.0F, 0.0F);
		}

		int j = entity.getDisplayTileOffset();
		IBlockState iblockstate = entity.getDisplayTile();

		if (iblockstate.getBlock().getRenderType() != -1) {
			GlStateManager.pushMatrix();
			this.bindTexture(TextureMap.locationBlocksTexture);
			float f4 = 0.75F;
			GlStateManager.scale(f4, f4, f4);
			GlStateManager.translate(-0.5F, (float) (j - 8) / 16.0F, 0.5F);
			this.func_180560_a(entity, partialTicks, iblockstate);
			GlStateManager.popMatrix();
			GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
			this.bindEntityTexture(entity);
		}

		GlStateManager.scale(-1.0F, -1.0F, 1.0F);
		this.modelMinecart.render(entity, 0.0F, 0.0F, -0.1F, 0.0F, 0.0F, 0.0625F);
		GlStateManager.popMatrix();
		super.doRender(entity, x, y, z, entityYaw, partialTicks);
	}

	/**
	 * Returns the location of an entity's texture. Doesn't seem to be called unless
	 * you call Render.bindEntityTexture.
	 */
	protected ResourceLocation getEntityTexture(T entity) {
		return minecartTextures;
	}

	protected void func_180560_a(T minecart, float partialTicks, IBlockState state) {
		GlStateManager.pushMatrix();
		Minecraft.getMinecraft().getBlockRendererDispatcher().renderBlockBrightness(state,
				minecart.getBrightness(partialTicks));
		GlStateManager.popMatrix();
	}
}
